Calculate in a simple way.
1、368+2649+ 135 1 2、 87+ 10 1+ 1 13
3、24+ 127+476+573 4、400-273- 127
5、327+(96- 127) 6、72×98
7、999+99+9 8、442- 103- 142
9、67×5×2 10、25×(78×4)
1 1、72× 125 12、9000÷ 125÷8
13、400÷25 14、25×36
15、 103×27 16、76× 102
17、3600÷25÷4 18、99×35
19、(25+ 12)×4 20、56×27+27×44
2 1、56×99+56 22、 125×25×8×4
23、25×32× 125 24、 125×64
( 1)(78+6 1)+39 (2)700-82- 18
(3)348+ 163+242+4 10+537
(4) 125×47-47×25
(5)20 1×3 16
(6)374-205+226-95
(7)3000-999
(8)997×7+2 1 (9)87×470+870×53
( 10)(55+55+55+55×5)× 125
( 1 1) 125×(8+40)×25 ( 12)99+49×99
( 13)265×97+4×265
( 14)454+999×999+545
( 15)9999×36+6666×3×32
( 16) 124×38+65× 124+76× 1 10-76×7
( 17)62×4+44×5+5× 18
( 18)3400-62×34-38×20-38× 14
( 19) 1992× 199 1 199 1- 199 1× 1990 1990
The number of calculation problems in grade six is 30 (83-29)+(7- 1) = 54+6 = 60, (83-29)+(7-6) = 54+ 1 = 55, (83-54)+(7
(83-54)+(7-6)=29+ 1=30, (83-59)+(7- 1)=24+6=30, (83-59)+(7-6)=24+ 1=25
(83-64)+(7-2)= 19+5=24, (83-64)+(7-5)= 19+2=2 1, (83-69)+(7-2)= 14+5= 19
(83-69)+(7-5)= 14+2= 16, (86-27)+(4- 1)=59+3=62, (86-27)+(4-3)=59+ 1=60
(86-29)+(4- 1)=57+3=60, (86-29)+(4-3)=57+ 1=58, (86-57)+(4- 1)=29+3=32
(86-57)+(4-3)=29+ 1=30, (86-59)+(4- 1)=27+3=30, (86-59)+(4-3)=27+ 1=28
(9 1-24)+(8-3)=67+5=72, (9 1-24)+(8-5)=67+3=70, (9 1-27)+(8-3)=64+5=69
3X+ 189 = 52 1 4Y+ 1 19 = 22 3X * 189 = 5 8Z/6 = 458 3X+77 = 59
4Y-6985 = 8 1 87X * 13 = 5 7Z/93 = 4 1 15X+863-65X = 54 58Y * 55 = 27489
1 A chemical fertilizer factory produced a batch of chemical fertilizers and shipped them out in three times. The first batch is more than 200 tons, the second batch is the first time, and the third batch is 450 tons. How many tons of chemical fertilizer are there?
2. It takes one worker to complete a project alone 12 days, and Party A and Party B can cooperate for 8 days to complete it. How many days does it take for Party B to finish it alone?
The store distributes 320kg of oranges, apples and pears, and the ratio of oranges to apples is 5:6. The weight of pears is apples. How many kilograms are oranges heavier than pears?
The minute hand of the wall clock is 20 cm long. After 45 minutes, how far did the tip of this minute hand move?
When water turns into ice, its volume increases. There is a piece of ice with a volume of 2 cubic decimeters. What is the volume after melting?
A barrel of oil weighs 23 kilograms. After removing 50% oil, the weight is 12kg. How many kilograms of oil are there in the barrel? How much does this bucket weigh?
Xiaoshengchu complex parting calculation problem ① 2700× (506-499) ÷ 900
②33.02-( 148.4-90.85)÷2.5
=2700×7÷900
=33.02-57.55÷2.5
= 18900÷900
=33.02-23.02
=2 1
= 10
③( 1÷ 1- 1)÷5. 1
④ 18. 1+(3-0.299÷0.23)× 1
=( 1- 1)÷5. 1
= 18. 1+ 1.7x 1
=0÷5. 1
= 18. 1+ 1.7
=0
= 19.8
( 1)36+59+4 1+54
(2)23×7+23×3
(3) 1462-369-63 1
(4)60506- 19460÷35
(5)23072÷4 12×65
(6) 184×38+ 1 16×38- 1 1300
(7)(7969 1-46354)÷629
(8)325÷ 13×(266-250)
(9)74+ 100÷5×3
( 10)(440-280)×(300-260)
1 1) 100+25×3-90
12)90÷2+ 136
13)70×74+ 100÷5
14)38+ 1 16×7+23
15)369-(63 1 ÷5)×3
Off-model calculation.
408- 12×24 (46+28)×60 42×50- 17 15÷5
32+ 105÷5 ( 108+47)×52 420×(327-238)
(4 12 1+2389)÷7 67 1× 15-974 469× 12+ 1492
405×(32 13-3 189) 5000-56×23 125×(97-8 1)
6942+480÷3 304×32- 154 20+80÷4-20=
100÷(32-30)×0= 25×4- 12×5=
70×〔(42-42)÷ 18〕= 75×65+75×35=
Calculate the following questions in a simple way.
1、89+ 124+ 1 1+26+48 2、875- 147-23
3.25× 125×40×8 4、 147×8+8×53
5、 125×64 6、0.9+ 1.08+0.92+0. 1
Calculate in a simple way
①89+ 124+ 1 1+26+48 ②875- 147-23
③ 147×8+8×53 ④ 125×64
Calculate the following questions.
1.280+840÷24×5 2.85×(95- 1440÷24)
3.58870÷( 105+20×2) 4.80400-(4300+870÷ 15)
5. 1437×27+27×563 6.8 1432÷( 13×52+78)
7. 125×(33- 1) 8.37.4-(8.6+7.24-6.6)
Do the math. ( 1∶ 1)
( 1) 156× 107-7729 (2)37.85-(7.85+6.4)
(3)287×5+96990÷3 18 (4) 1554÷[(72-58)×3]
exclusive of
2800÷ 100+789 (947-599)+76×64
1.36×(9 13-276÷23) 2.(93+25×2 1)×9
3.507÷ 13×63+498 4.723-(52 1+504)÷25
5.384÷ 12+23×37 1 6.(39-2 1)×(396÷6)
( 1) 156×[( 17.7-7.2)÷3] (2)[37.85-(7.85+6.4)] ×30
(3)28×(5+969.9÷3 18) (4)8 1÷[(72-54)×9]
57× 12-560÷35 848-640÷ 16× 12
960÷( 1500-32×45) [ 192-(54+38)]×67
138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50 704×25 25×32× 125 32×(25+ 125)
178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2 98× 199
123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16) 178×99+ 178
79×42+79+79×57 7300÷25÷4 8 100÷4÷75 75×27+ 19×2 5 3 1×870+ 13×3 10
4×(25×65+25×28) 138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50
25×32× 125 32×(25+ 125) 102×76 58×98
178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2
98× 199 123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16)
178×99+ 178 79×42+79+79×57 7300÷25÷4 8 100÷4÷75
30 road ratio simplification calculation problem 3. 14: 28.26 = 1: 9
4 1.23:4 123 15:0. 12
10: 120= 1: 12
123:3 =4 1: 1
65: 13 =5: 1
16:0.5 =32: 1
0.5: 10= 1:20
42:54=7:9
1 1 1:3=36: 1
3: 12= 1:4
0.5:0.2 =5:2
6.28:50.24= 1:8
30-way one-time calculation problem 5X-5=23 x=28/5.
6+ 1/4x=24 x=72
45-9x= 18 x=3
17- 1 1x = 23/2 x = 1/2
3+3x= 15 x=4
3/7x- 15=6 x=49
2/3x+ 13= 17 x=6
22+4/3x=34 x=9
64-7x= 15 x=7
3x+3/5=3 x=4/5
Ask twenty calculation questions! answer
54 1*56+65 654*87+65 45 1*87+95 547*89+ 12 456*87+ 12 654*89+ 16 65*45+ 12 45*89+ 12 45*87+95 45* 45+89 78*56+2 456+2 1*89 (456+98)*5 789/45+(89+560)
The adoption rate of anonymous answers: 22.3% 2009-01-2118: 47.
1. Fill in the blanks (3 points for each question, ***36 points)
The common factor of 1, single item-5x2yz,15xxyz2 is.
2,,, The simplest common denominator is.
3. When x=, the value of the score is zero.
4. in V=V0+at, if v, V0, a and a≠0 are known, then t=
5. If x2+ax-b= (x+ 1) (x-2), then a=, b=.
6. If a+b=0, polynomial a3 +a2b+ab2+b3=.
7. Calculate12a2b-3÷ (2a-1B2C) 3 =.
8. Fill in the appropriate algebraic expression in brackets to make it hold.
9. Decomposition factor: A2-4+AB-2B =.
10, when 0 < x < 2, simplify+=.
1 1, given that x=0 is a solution of equation =, then a=.
12. When someone hits the target, he hits the target A ring m times each time and the target B ring n times each time, then the average number of rings hit each time is.
Second, multiple-choice questions (3 points for each question, *** 18 points)
13, the following factorization result is correct ()
a、x2-5x-6 =(x-2)(x-3)b . 2 x2+2x = x(2x+2)
C.a3-a2+a=a(a2-a) D.xy-2x = x(y-2)
14. If x in the score is enlarged by 2 times and the value of y is reduced to half, then the value of the score is ().
A, unchanged b, expanded by 2 times c, expanded by 4 times d, which is half of the original.
15, if -= 3, the value of is ()
A.b .-c . d-
16. Among the following factorizations, ① 4x2x2+24xy2+36y2 = (2xy+6y) 2,
②3x-3xy+xy2 = 3x( 1-y+y2)③n(m-n)2-m(n-m)2 =(n-m)3，
④ A4-B4 = (A2+B2) (A2-B2), where () can be further decomposed.
a，4 B，3 C，2 D， 1
17, polynomial 4x2+ 1 and a monomial make it a completely flat algebraic expression, then such a monomial has ().
a，5 B，4 C，3 D，2
18 The following algebraic transformation is correct ()
A.= B. x÷x- 1 = 1 C. = D. =2
Third, the calculation problem (7 points for each small question, *** 14 points)
19 、- = 1 20、⊙(x+ 1)
Four, answer questions (8 points for each question, ***24 points)
2 1, known as | x-3y- 1 |+x2-4xy+4y2 = 0, find the value of x+y.
22. Simplify before evaluating.
(-)-a-b, where a = 2 and b =
23. It is known that the quadratic trinomial x2+mx-12 about x can be decomposed into the product form of the first factor of two integral coefficients, and all the values can be found and decomposed into factors.
Verb (abbreviation of verb) 24. The following equation x2+2ax-3a2 = 0 can be solved by factorization. That is, (x-a) (x+3a) = 0, so x 1 = a, x2 = -3a Solve the following equations in a similar way, record the roots of the equations, fill in the table below, and calculate the values of x 1+x2, x 1 x2.
Square path
Solution of the equation
x 1+x2
x 1 x2
x2+3x-4=0
x2-5x-24=0
x2+7x+ 12=0
x2- 1 1x+30=0
From the obtained data, can we conclude that the sum and product of two X 1 of equation x2+px+q=0 is regular? (9 points)
25, using-= calculation (9 points)
+ +……+
26. The time required for a ship to sail against the current is 1.5 times as long as it needs to sail against the current. There are two ships today, starting from Pier A and Pier B at the same time, face to face. After three hours of meeting, if the two ships are at the same speed in still water, how many hours will it take for the two ships to travel upstream and upstream?
(2) What is the ratio of current velocity to ship speed in still water?
(3) How many hours does it take a ship to get from A to B in still water? (10 points
Ask 30 chemical calculation questions and answers to open Baidu
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Give ten off-type calculation problems with brackets and brackets. 1.3/7 × 49/9 - 4/3
2.8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4.8× 5/4 + 1/4
5.6÷ 3/8 – 3/8 ÷6
6.4/7 × 5/9 + 3/7 × 5/9
7.5/2 -( 3/2 + 4/5 )
8.7/8 + ( 1/8 + 1/9 )
9.9 × 5/6 + 5/6
10.3/4 × 8/9 - 1/3
1 1.7 × 5/49 + 3/ 14
12.6 ×( 1/2 + 2/3 )
13.8 × 4/5 + 8 × 1 1/5
14.3 1 × 5/6 – 5/6
15.9/7 - ( 2/7 – 10/2 1 )
16.5/9 × 18 – 14 × 2/7
17.4/5 × 25/ 16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/ 15
19. 17/32 – 3/4 × 9/24
20.3 × 2/9 + 1/3
2 1.5/7 × 3/25 + 3/7
22.3/ 14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24.9/22 + 1/ 1 1 ÷ 1/2
25.5/3 × 1 1/5 + 4/3
26.45 × 2/3 + 1/3 × 15
27.7/ 19 + 12/ 19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29.8/7 × 2 1/ 16 + 1/2
30. 10 1 × 1/5 – 1/5 × 2 1
Thirty subtraction problems in senior one? where
One-dimensional quadratic equation calculation problem (complex point) 6ax2+(b+c+5)x+bc+3b+2c+6=0, namely
6ax2+(b+c+5)x+bc+(b+2)(c+3)=0